
public class MathUtil {
    public static int add(int a,int b){
        return a+b;
    }
    public static int sub(int a,int b){
    return a-b;
    }
    public static  int mul(int a,int b){
        return a*b;
    }
    public static  int div(int a,int b){
        return a/b;
    }
    public static  int square(int a){
        return a*a;
    }
    public static  double sqrt(int a){
        return Math.sqrt(a);
    }

}
